Rectangle Calculator
Calculate both the area and the perimeter of a rectangle at once.
Calculate
Enter your values below.
Result
Area
0
Perimeter
0
Formula used
Area = L × W, Perimeter = 2(L + W)
Example: 10 × 4 → area = 40, perimeter = 28.
How to use this calculator
- Enter Length, Width.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
How is this different from the Area Calculator?
This shows both area and perimeter together in one result, for convenience.
Can length and width be the same?
Yes, that describes a square — see the dedicated Square Calculator for that case.
What units does this use?
Any consistent linear unit; area comes out squared, perimeter stays linear.
Can I use decimal measurements?
Yes, decimals are fully supported.